Growth tolerance, concentration, and uptake of heavy metals as ameliorated by silicon application in vegetables

Ngugi, Moses M.; Gitari, Harun I.; Muui, Catherine W.; Gweyi-Onyango, Joseph P.

doi:10.1080/15226514.2022.2045251

Cited by 17 publications

(4 citation statements)

References 56 publications

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“…This increase in the number of leaves may possibly be due to the presence of essential nutrients present in sewage wastewater [25]. The present findings are in accordance with earlier work [26] that found that the use of sewage wastewater without filtration increased the number of leaves in okra and tomato. The fresh and dry weights of the roots, leaves, and total biomass of the selected vegetables were enhanced due to the presence of macro-and micronutrients in the sewage wastewater.…”

Section: Discussionsupporting

confidence: 93%

“…Different plant researchers evaluated that filtered water had a lower heavy metal concentration than unfiltered sewage wastewater [32]. The present findings are in line with the earlier work of Naz et al [26] because they also evaluated that sand columns were capable of reducing the heavy metal concentrations in two vegetables: okra and tomato. Similarly, Naz et al [33] also reported that heavy metals were found to be more abundant in spinach plants when irrigated with sewage wastewater.…”

Section: Discussionsupporting

confidence: 91%

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Purification of Sewage Wastewater though Sand Column Filter for Lessening of Heavy Metals Accumulation in Lettuce, Carrot, and Cauliflower

Naz

Anjum

Sadiq

et al. 2022

Water

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Sewage wastewater is one of the richest sources of mineral nutrients contributing toward plant growth and yield. However, the accumulation of heavy metals in the edible parts of vegetables and fruits can be dangerous to life. The current research aimed to evaluate the performance of a sand column filter for the elimination of heavy metals from sewage wastewater applied to selected vegetables. The contents of heavy metals, i.e., Pb+2, Ni+2, Cu+2, and Fe+2, were estimated to be higher in untreated sewage wastewater than in treated water. The number of leaves, fresh and dry weights of leaves, roots, and total biomass of lettuce, carrot, and cauliflower were improved due to the irrigation of unfiltered sewage wastewater compared to sewage wastewater. The curd diameter, fresh and dry weights of curd, stem fresh weight of cauliflower, and the root length and diameter of carrot increased after irrigation with the unfiltered sewage wastewater in comparison to the treated sewage wastewater. The accumulation of heavy metals, i.e., Pb+2, Ni+2, Cu+2, and Fe+2, was higher in the roots, leaves, and edible parts of the selected vegetables. In the present study, the Cd+2 and Cr+2 concentrations were not affected by the filtration process through a sand column filter. Conclusively, filtration through a sand column filter is effective for the removal of heavy metals from sewage wastewater used to irrigate agricultural land.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 91%

Purification of Sewage Wastewater though Sand Column Filter for Lessening of Heavy Metals Accumulation in Lettuce, Carrot, and Cauliflower

Naz

Anjum

Sadiq

et al. 2022

Water

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“…An increase in leaf length may also be due to prolonged vegetative growth, which might have increased the leaf length. Shorter plants under N, P, and K deficiency might have been due to their effects on cell elongation, photosynthesis, water uptake as well as cell division [25][26][27]. Further, MT had more water holding capacity and little root disturbance thus explaining the high plant height.…”

Section: Interactive Effects Of Tillage and Inorganic Nutrients On Ma...mentioning

confidence: 99%

Tillage Methods and Inorganic Nutrients Source’s Interactive Effects in Maize and Beans Performance

Ogega

2022

ARR

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Maize and bean production have been on a declining trend in the majority of households in sub-Saharan African nations, Kenya inclusive. To improve the production of these crops, the current study aimed at assessing the interactive effects of minimum tillage and conventional tillage coupled with inorganic nutrient sources. The experiment was laid under a split-plot arrangement in a randomized complete block design where the tillage methods comprised the main plots whereas the sub plots were occupied by five inorganic fertilizers: NK, NP, KP, NPK, and NPK+Zn+B+Mg+Ca+S. The results indicated maize growth, yields, and chlorophyll concentration were significantly higher under minimum tillage and the combination of NPK+Zn+B+Mg+Ca+S nutrients. In addition, there was a significant effect on the interaction of tillage and inorganic nutrients on maize growth, yields, and chlorophyll concentration. The study, therefore, recommends the use of a combination of NPK+Zn+B+Mg+Ca+S in minimum tillage as viable options for optimal growth and production of maize and beans.

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“…Heavy metals in air in due course settle down on land and plants. Plants uptake these heavy metals and bio-accumulate the toxic elements in their leaves, stems, and roots [51][52][53]. These plants are later consumed by humans either directly or indirectly through cattle that fed on those plants.…”

Section: Introductionmentioning

confidence: 99%

Toxic Heavy Metals in Soil and Plants from a Gold Mining Area, South Africa

Raji¹,

Palamuleni²

2023

Heavy Metals - Recent Advances

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The mining of mineral deposits abundant in South Africa has led to the release of toxic heavy metals into the environment. The aim of this study was to investigate heavy metal pollution from a gold mining area. The concentrations of arsenic, cadmium, lead, and zinc were analyzed in soil and plants found within 500 m and 1000 m radius of a gold mine established in North-West. The concentrations of these heavy metals were determined using Inductively Coupled Plasma Mass Spectrometry. The results showed that the concentrations of the studied heavy metals were all below the national and international threshold but higher than the concentrations found several kilometers away from the mining area, the natural background concentration. The results from the pollution load index shows that the topsoil is contaminated for the selected heavy metals. There was accumulation of the studied heavy metals in the studied Eragrostis hypnoides plant’s leaves and roots. In this study, it was revealed that zinc and cadmium bioaccumulated in the plant via the soil. These findings suggests that the consumption of agricultural products from farms within the 1 km radius of the mining site could be detrimental to the wellbeing of direct and indirect consumers.

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Growth tolerance, concentration, and uptake of heavy metals as ameliorated by silicon application in vegetables

Cited by 17 publications

References 56 publications

Purification of Sewage Wastewater though Sand Column Filter for Lessening of Heavy Metals Accumulation in Lettuce, Carrot, and Cauliflower

Purification of Sewage Wastewater though Sand Column Filter for Lessening of Heavy Metals Accumulation in Lettuce, Carrot, and Cauliflower

Tillage Methods and Inorganic Nutrients Source’s Interactive Effects in Maize and Beans Performance

Toxic Heavy Metals in Soil and Plants from a Gold Mining Area, South Africa

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